2026-06-10T07:08:41Z https://oedatarep.ct.ingv.it/oai2d

oai:oedatarep-invenio-rdm.com:ff98c-gp297 2025-07-29T12:42:08Z

Barberi, Graziella Istituto Nazionale di Geofisica e Vulcanologia (INGV) Barberi, Graziella Sgroi, Tiziana 2025 We computed new 3D locations for 8003 earthquakes (0.6≤M≤5.6) that occurred in the southern Tyrrhenian Sea and northern Sicily between 1 January 2000 and 31 August 2021. The events were recorded by the land seismic network managed by the INGV and a seafloor network, consisting of 14 Ocean Bottom Seismometers and Hydrophones, deployed during the Tyrrhenian Deep sea Experiment (TYDE, December 2000 – May 2001; Dahm et al., 2002; Sgroi et al., 2006) and the NEMO-SN1 seafloor observatory (October 2002 – February 2003; June 2012 - June 2013; Sgroi et al. 2021). We collected basic data (travel times) from available datasets (ISIDe Working Group, 2007) and published studies (Sgroi et al., 2006; Barberi et al., 2006; Monna et al., 2013) and processed them using the 3D velocity model of Scarfì et al. (2018) and the tomoDDPS algorithm (Zhang et al., 2009). This software has the advantage of using a combination of both absolute and differential arrival times, so that for earthquakes with closely spaced foci, travel times errors due to inaccurate velocity models in the volume outside the cluster will essentially be cancelled. Furthermore, for 116 events, magnitude values were not available because they were located only using the seafloor network. We assigned them the value 999 and added the note "magnitude not available" in the notes field. The table (STyrr_EQ3D_2000-2021) shows the origin time and the hypocentre parameters of locations. Specifically: ID = identification number; Date (year/month/day); O.T. = Origin Time (hour, minute, second and cent); Lat = latitude north in degrees; Long = longitude east in degrees; Depth in km; MagType = duration (Md), local (ML) or moment magnitude (Mw); Magnitude; Notes = magnitude not available. https://doi.org/10.13127/styrr_eq3d/2000-2021 oai:oedatarep-invenio-rdm.com:ff98c-gp297 Istituto Nazionale di Geofisica e Vulcanologia (INGV) https://doi.org/10.4401/ag-3137 https://doi.org/10.1029/2002EO000221 https://doi.org/10.13127/ISIDE https://doi.org/10.1002/ggge.20227 https://doi.org/10.4401/ag-3130 https://doi.org/10.4401/ag-8575 https://doi.org/10.1029/2009GC002709 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Southern Tyrrhenian Sea Northern Sicily Earthquake locations Earthquake Locations in southern Tyrrhenian Sea and northern Sicily using a 3D velocity model between 1 January 2000 and 31 August 2021 (STyrr_EQ3D_2000-2021) info:eu-repo/semantics/other

oai:oedatarep-invenio-rdm.com:yj0mt-6xh35 2024-09-12T10:18:25Z

Miraglia, Lucia Istituto Nazionale di Geofisica e Vulcanologia (INGV) Miraglia, Lucia 2022-12-12 The database consist of Bulk rock compositions (major and trace elements) of lava and pyroclasts sampled at Etna during the 2021 INGV-OE petrologic monitoring activity. The preparation and analyses of the sample have been performed at INGV laboratories. After archiving, the samples were reduced to powder, the LOI was determined and finally they were melted (Miraglia, 2012 ). The beads were analyzed for X-ray fluorescence. The bulk rock compositions have been analyzed at INGV-OE with the Rigaku Primus II XRF. The accuracy of our measurements has been checked through replicate analyses of the international standard (Jarosewich et al., 1980). The precision, expressed as relative standard deviation, is less than 1% for SiO2, Al2O3, FeO, MgO and CaO and less than 3% for TiO2, MnO, Na2O, K2O and P2O5 (Miraglia, 2013), <5% for Ba, Ce, La, Nb, Nd, Rb, Sm, Sr, V, Y, Yb, Zn e Zr, e <10% for Cr, Ni e Th (Miraglia, 2017). Each measure is the average of 3 analyses. https://doi.org/10.13127/etna/bret_2021 oai:oedatarep-invenio-rdm.com:yj0mt-6xh35 https://doi.org/10.13127/etna/bret_2021 eng Istituto Nazionale di Geofisica e Vulcanologia (INGV) info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Etna XRF Bulk rock analyses Major elements Trace elements Petrological monitoring Etna Bulk rock (major and trace elements) analyses 2021 (BRET_2021) info:eu-repo/semantics/other

oai:oedatarep-invenio-rdm.com:vcptk-7gs74 2024-09-12T10:18:26Z

Istituto Nazionale di Geofisica e Vulcanologia (INGV) Cappello, Annalisa Bilotta, Giuseppe Branca, Stefano Ganci, Gaetana Proietti, Cristina Zuccarello, Francesco 2023 The new lava flow hazard map from flank eruptions at Mt. Etna volcano obtained by using a probabilistic approach. The methodology includes different stages: (i) the definition of the classes of the expected eruptions, effusion rate curves and their occurrence probability; (ii) assessment of the spatiotemporal probability of future vent opening; (iii) running of lava flows emplacements considering a large number of eruptive scenarios with the GPUFLOW model; (iv) computation of the long-term probability for each point of the area interested by simulated lava flows. https://doi.org/10.13127/volc_hazard/etna_flank_lava_2023 oai:oedatarep-invenio-rdm.com:vcptk-7gs74 Istituto Nazionale di Geofisica e Vulcanologia (INGV) https://doi.org/10.1594/PANGAEA.825014 https://doi.org/10.1038/srep03493 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode lava flow hazard Etna flank eruptions Lava flow hazard map from flank eruptions at Etna info:eu-repo/semantics/other

oai:oedatarep-invenio-rdm.com:db3sw-0jm88 2024-09-12T10:18:23Z

Miraglia, Lucia Istituto Nazionale di Geofisica e Vulcanologia (INGV) Miraglia, Lucia 2022-12-13 The database consist of glass compositions (major elements) of pyroclasts sampled at Etna from May to October 2021 during the INGV-OE petrologic monitoring activity. The glass compositions of major elements have been analyzed at INGV-OE with Zeiss LEO-1430 scanning electron microscope, equipped with an INCA ENERGY Oxford Instruments EDS micro-analytical system (SEM-EDS). Analytical conditions are 20 keV of acceleration tension, 1200 nA of beam current and XPP data reduction routine. In order to minimize alkalis loss during analysis, a square raster of 10 microns is used. The accuracy of our measurements has been checked through replicate analyses of the international standard VG-2 Glass basaltic, USNM 111240/52 (Jarosewich et al., 1980). The precision, expressed as relative standard deviation, is less than 1% for SiO2, Al2O3, FeO, MgO and CaO and less than 3% for TiO2, MnO, Na2O, K2O and P2O5 (Miraglia, 2012). The analyses have been performed in groundmass glass containing less than 15% microlites. Each measure is the average of 10 to 15 analyses. Dataset Legend Sample label: name identificative of the sample the acronyms used for Etna summit craters are: VOR= Voragine Crater, BN=Bocca Nuova Crater, NEC=North-East Crater, SEC=South-East Crater, NSEC=New South-East Crate; Data emission: Date of sample eruption; Sample Type: field characteristics of a sample (bomb, lapilli or ash); Activity type: description of the volcanic activity provided from the Access archive of the INGV-OE Petroteca. https://doi.org/10.13127/etna/gmc_may_oct_2021 oai:oedatarep-invenio-rdm.com:db3sw-0jm88 https://doi.org/10.13127/etna/gmc_may_oct_2021 eng Istituto Nazionale di Geofisica e Vulcanologia (INGV) info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Etna SEM-EDS Major elements Glass compositions Petrologic monitoring Etna Glass analyses May-October2021 (GMCET_MO2021) info:eu-repo/semantics/other

oai:oedatarep-invenio-rdm.com:qw599-k5507 2024-09-12T10:18:23Z

Miraglia, Lucia Istituto Nazionale di Geofisica e Vulcanologia (INGV) Miraglia, Lucia 2022-12-13 The database consist of glass compositions (major elements) of pyroclasts sampled at Etna during the 2022 INGV-OE petrologic monitoring activity. The glass compositions of major elements have been analyzed at INGV-OE with Zeiss EVO 10 scanning electron microscope, equipped with an INCA ENERGY Oxford Instruments EDS micro-analytical system (SEM-EDS). Analytical conditions are 20 keV of acceleration tension, I Probe 300 ρA and XPP data reduction routine. In order to minimize alkalis loss during analysis, a square raster of 10 microns is used. The accuracy of our measurements has been checked through replicate analyses of the international standard VG-2 Glass basaltic, USNM 111240/52 (Jarosewich et al., 1980). The precision, expressed as relative standard deviation, is less than 1% for SiO2, Al2O3, FeO, MgO and CaO and less than 3% for TiO2, MnO, Na2O, K2O and P2O5 (Miraglia, 2012). The analyses have been performed in groundmass glass containing less than 15% microlites. Each measure is the average of 10 to 15 analyses. Dataset Legend Sample label: name identificative of the sample the acronyms used for Etna summit craters are: VOR= Voragine Crater, BN=Bocca Nuova Crater, NEC=North-East Crater, SEC=South-East Crater, NSEC=New South-East Crate; Data emission: Date of sample eruption; Sample Type: field characteristics of a sample ( bomb, lapilli or ash); Acti vity type: description of the volcanic activity provided from the Access archive of the INGV-OE Petroteca. https://doi.org/10.13127/etna/gmc_2022 oai:oedatarep-invenio-rdm.com:qw599-k5507 https://doi.org/10.13127/etna/gmc_2022 eng Istituto Nazionale di Geofisica e Vulcanologia (INGV) info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Etna SEM-EDS Major elements Glass compositions Petrologic monitoring Etna Glass analyses 2022 (GMCET_2022) info:eu-repo/semantics/other

oai:oedatarep-invenio-rdm.com:tjd5k-m6c22 2024-09-12T10:18:24Z

Istituto Nazionale di Geofisica e Vulcanologia (INGV) Scarfì, Luciano Cannavò, Flavio D'Amico, Sebastiano Messina, Alfio Alex Yang, William S. 2022-06-24 We computed the full seismic moment tensor of the earthquakes (3.5˂ML ≤4.8) that occurred in the Etna area in the period May 2008 to December 2020, recorded by the seismic broadband network managed by the INGV - Osservatorio Etneo. The full seismic moment tensor computation, through the inversion of the seismic waveforms, allows for a comprehensive definition of an earthquake source. In particular, the moment tensor is directly related to the earthquake fault orientation and kinematics, while the derived moment magnitude, Mw, is the most reliable quantity for measuring the size of an earthquake. In addition, the source tensor can provide information on the decomposition into isotropic (ISO), double-couple (DC) and compensated linear vector dipole (CLVD) components. This distinction is a tool for classifying and physically interpreting seismic sources. Indeed, although most tectonic earthquakes are dominated by shear deformation in narrow area (DC component of the tensor), in volcanic and geothermal areas, other processes, such as the migration of magmatic and hydrothermal fluids or rupture on non-planar faults, can produce earthquakes with significant non-double-couple components. (e.g. Minson et al. 2007; Saraò et al., 2010; 2016). The full moment tensor solutions have been calculated using the software gCAP3D (https://www.eas.slu.edu/People/LZhu/home.html) based on the cut-and-paste (CAP) method by Zhu and Helmberger (1996) and improved by Zhu and Ben-Zion (2013). This method is based on the waveform inversion of Pnl and surface wave segments and has proven to be effective for analysing earthquakes over a wide range of magnitudes, even those with magnitudes between 2.5 and 4. The CAP method minimizes the misfit between observed and synthetic seismograms using a grid search to obtain the best moment magnitude, source depth and focal mechanism. The inversion technique breaks each waveform into Pnl and surface wave windows. This is because they are sensitive to different parts of crustal structure and have different amplitude decay with distance. The surface waves, although large in amplitudes, are easily influenced by shallow crustal heterogeneities, while the Pnl waves are controlled by the averaged crustal velocity structure and therefore are more stable. The fit is evaluated independently in each phase window and over different frequency bands for P and S waves. In comparison to the whole waveform approach, the separation of P and S waves in both time and frequency domains enhances the contribution of the P-waves. In order to get reliable source mechanisms, it is necessary to compute synthetic seismograms, which in turn requires a reasonable velocity/attenuation model for generating Green's functions. We used the frequency–wavenumber (F–K) integration method as described by Zhu and Rivera (2002) and the 1D velocity and attenuation models derived from Alparone et al. (2012) and Martinez-Arevalo et al. (2005). Synthetics and observed ground velocity were filtered in the same frequency bands, from 0.02 to 0.1 Hz for the surface waves and from 0.05 to 0.3 Hz for the Pnl. The starting dataset of 1 D hypocentral locations, local magnitude and epicentral area is coming from the "Mt. Etna Revised and Concise Seismic Catalog from 1999 ETNA RCSC" (Alparone et al., 2020 https://doi.org/10.13127/ETNASC/ETNARCSC) which collects local earthquakes recorded by the Permanent and Mobile Seismic Network, managed by INGV-OE. The catalog is divided vertically into three sections. In the first one, the origin time, location and local magnitude parameters of the selected earthquakes are reported; they are derived from "Mt. Etna Revised and Concise Seismic Catalog from 1999 ETNA RCSC" (Alparone et al., 2020). The second and third section show for each event the solutions of the moment tensor inversion, considering respectively a pure double-couple mechanism (2nd section) and the full solution, i.e. including DC, ISO and CLVD components (3rd section). Specifically, the reported parameters are the associated moment tensor depth (MT depth), the Moment Magnitude value (Mw), the strike, dip and rake of one nodal plane (in degrees), the Seismic Moment (M0), the six independent components of the tensor (Mxx, Mxy, Mxz, Myy, Myz, Mzz), and the isotropic and CLVD strength. https://doi.org/10.13127/emts/2008_2020 oai:oedatarep-invenio-rdm.com:tjd5k-m6c22 https://doi.org/10.13127/emts/2008_2020 eng Istituto Nazionale di Geofisica e Vulcanologia (INGV) https://doi.org/10.13127/ETNASC/ETNARCSC https://doi.org/10.1016/j.jvolgeores.2012.04.001 https://doi.org/10.1029/2005GL023736 https://doi.org/10.1029/2006JB004847 https://doi.org/10.1111/j.1365-246X.2010.04547.x https://doi.org/10.5281/zenodo.5774162 https://doi.org/10.1785/BSSA0860051634 https://doi.org/10.1046/j.1365-246X.2002.01610.x https://doi.org/10.1093/gji/ggt137 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Moment Tensor Etna Earthquakes Moment Tensor Solutions for ML ≥ 3.5 Etna earthquakes 2008-2020 (EMTS_2008_2020) info:eu-repo/semantics/other

oai:oedatarep-invenio-rdm.com:wrzts-2gp19 2024-09-12T10:18:24Z

Istituto Nazionale di Geofisica e Vulcanologia (INGV) Napoli, Rosalba Daniela Sicali, Antonino 2023-06-15 The data represent the total intensity (F) of the Earth's magnetic field (or geomagnetic field) acquired continuously by the stations of the Etna permanent network from XX to YY. All the stations are located along a South-North profile that crosses the summit area of Etna and are equipped with Overhauser effect scalar magnetometers with a sensitivity of 0.01 nT. The network also includes a reference station located in Cesarò on the Nebrodi Mountains. The data are synchronized by a GPS and is acquired with a sampling rate of 5-10 seconds. Time series of geomagnetic data allow to observe and evaluate the anomalous variations of the magnetic field associated with the modifications of the stress field and of the thermodynamic state produced by magma rising in the more superficial layers of the volcano. The continuous data analysis therefore contributes to the evaluation of the spatio-temporal evolution of the dynamics in progress. Data file content, for each row: Month-Day-Year Hour:Min:Sec F1 F2 G Q V U T Where: F1 is the total field intensity (nT); F2 is the total field intensity of the northern sensor of a gradiometric configuration (nT); G is the GEM Systems gradient between sensors of a gradiometric configuration (nT); Q is the GEM Systems quality field (a-z or 0-99) ; V is battery voltage (0.01171875*V+11.0 volt); U is relative umidity (0.390625*U %); T is Temperature (-0.3125*T+40 c°) F2 or G are present only for gradiometric configuration Time is in UTC. Examples: 02-11-15 11:03:00 48759.88 a 176 199 005 02-11-2015 11:03:00 48759.88 99 176 199 005 03-01-2023 00:00:00 48759.88 99 176 199 005 03-01-2023 00:00:00 48759.88 48769.88 99 176 199 005 05-01-2023 00:00:00 48759.88 0148.74 99 176 199 005 https://doi.org/10.13127/emfc/2017 oai:oedatarep-invenio-rdm.com:wrzts-2gp19 https://doi.org/10.13127/emfc/2017 eng Istituto Nazionale di Geofisica e Vulcanologia (INGV) info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Etna Magnetic Magnetic Etna 2017 (EMFC_2017) info:eu-repo/semantics/other

oai:oedatarep-invenio-rdm.com:wv7cv-kny75 2024-09-12T10:18:24Z

Istituto Nazionale di Geofisica e Vulcanologia (INGV) Privitera, Laura Aloisi, Marco Cannavò, Flavio Di Grazia, Giuseppe Gambino, Salvatore Scaltrito, Antonio 2024 Tilt and Volcanic Tremor Data acquired on Nov. 14-15, 2022 at Etna Volcano (Italy) https://doi.org/10.13127/etna/tilt_tremor_nov2022 oai:oedatarep-invenio-rdm.com:wv7cv-kny75 https://doi.org/10.13127/etna/tilt_tremor_nov2022 Istituto Nazionale di Geofisica e Vulcanologia (INGV) info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode tilt volcanic tremor etna Etna Tilt and Volcanic Tremor data for November 14-15, 2022 info:eu-repo/semantics/other

oai:oedatarep-invenio-rdm.com:5bamm-04152 2024-09-12T10:18:26Z

Di Renzo, Valeria Arienzo, Ilenia Istituto Nazionale di Geofisica e Vulcanologia (INGV) Arienzo, Ilenia Di Renzo, Valeria Miraglia, Lucia Corsaro, Rosa Anna 2024 The database includes 87Sr/86Sr and 143Nd/144Nd isotopic ratios measured on bulk rocks of lava and pyroclasts sampled at Etna during 2020-2022 INGV-OE monitoring activity. The chemical treatment of the samples was carried out in the clean laboratory of the INGV-OV. Before chemical dissolution whole rock have been dissolved with high-purity HF–HNO3–HCl mixtures. Sr and Nd have been separated from the matrix through conventional ion-exchange chromatographic procedures, described in detail in Arienzo et al. (2013, 2014). Isotopic ratios have been measured by thermal ionization mass spectrometry (TIMS), using a Triton Plus® (Thermo Scientific) solid-source multicollector mass spectrometer in static mode. The blank was negligible considering the average Sr content of the samples; no determinations for Nd blanks was performed. Measured 87Sr/86Sr and 143Nd/144Nd ratios have been normalized for within-run isotopic fractionation to 88Sr/86Sr =8.375209 and 146Nd/144Nd =0.7219 respectively, using an exponential law for correction. During collection of isotopic data, replicate analyses of NIST-SRM 987 and JNdi-1 international reference standards have been performed to check for external reproducibility. During the period of analysis, the mean measured value (Goldstein et al., 2003) of 87Sr/86Sr 265 Sr for NIST-SRM 987 was 0.710242±0.000013 (2σ, where σ is the standard deviation of the values; n=48); that of 143Nd/144Nd for JNdi-1 was 0.512105±0.000007 (2σ, n=20) at Osservatorio Vesuviano. Sr and Nd isotope ratios of the samples have been normalized to the recommended values of NIST-SRM 987 and JNdi-1 (87Sr/86Sr 269 =0.710248; 143Nd/144Nd =0.512107; Zhang and Hu, 2020), respectively. https://doi.org/10.13127/etna/bret_iso_2020_2022 oai:oedatarep-invenio-rdm.com:5bamm-04152 https://doi.org/10.13127/etna/bret_iso_2020_2022 eng Istituto Nazionale di Geofisica e Vulcanologia (INGV) info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode TIMS isotopic analyses Etna South Est crater (SEC) 2020-2022 paroxysmal activity Strontium (Sr) and Neodymium (Nd) isotopic ratios of Mt. Etna bulk rocks 2020-2022 (BRET_ISO_2020_2022) info:eu-repo/semantics/other

oai:oedatarep-invenio-rdm.com:bg31q-nf515 2025-07-28T16:21:58Z

Barberi, Graziella Istituto Nazionale di Geofisica e Vulcanologia (INGV) Barberi, Graziella Sgroi, Tiziana 2025 We computed new 268 focal mechanisms (1.3≤M≤4.6), with rays traced through the 3D velocity model of Scarfì et al. 2018, of events occurred in the southern Tyrrhenian Sea and northern Sicily between 1 January 2000 and 31 August 2021. The earthquakes were recorded by the land seismic network managed by the INGV and a seafloor network, consisting of 14 Ocean Bottom Seismometers and Hydrophones, deployed during the Tyrrhenian Deep sea Experiment (TYDE, December 2000 – May 2001; Dahm et al., 2002; Sgroi et al., 2006) and the NEMO-SN1 seafloor observatory (October 2002 – February 2003; June 2012 - June 2013; Sgroi et al. 2021). We collected basic data (travel times and first polarities) from available datasets (ISIDe Working Group, 2007) and published studies (Sgroi et al., 2006; Barberi et al., 2006; Monna et al., 2013). Then we processed them using the 3D velocity model of Scarfì et al. (2018) and the tomoDDPS algorithm (Zhang et al., 2009). This software has the advantage of using a combination of both absolute and differential arrival times, so that for earthquakes with closely spaced foci, travel times errors due to inaccurate velocity models in the volume outside the cluster will essentially be cancelled. By using FPFIT software (Reasenberg and Oppenheimer, 1985), we obtained 268 focal solutions with an average uncertainty on the orientation of the nodal planes of about 10°. These focal mechanisms can be considered representative of the kinematics characterising the southern Tyrrhenian Sea and the northern Sicily, since they are distributed in all the main seismogenically active areas of the region. The table (STyrr_FM_2000-2021) shows focal parameters of the analysed earthquakes. Specifically: ID = identification number; Date (year/month/day); O.T. = Origin Time (hour, minute, second and cent); Lat = latitude north in degrees; Long = longitude east in degrees; Depth in km; MagType = duration (Md), local (ML) or moment magnitude (Mw); Magnitude; Npol = number of polarities; Plane 1 (STRK, DIP, RAKE), Plane 2 (STRK, DIP, RAKE) = strike, dip and rake of the first and second nodal planes; P-Axis (AZM, PLNG), T-Axis (AZM, PLNG) = azimuth and plunge of the P- and T-axes; Q = quality of the focal mechanism (2 = best quality; 1 = medium quality; 0 = low quality); Cat = category of the focal mechanism (NF = normal fault, NS = normal-strike, SS = strike-slip, TF = thrust fault, TS = thrust-strike, HV = horizontal-vertical). https://doi.org/10.13127/styrr_fm/2000-2021 oai:oedatarep-invenio-rdm.com:bg31q-nf515 Istituto Nazionale di Geofisica e Vulcanologia (INGV) https://doi.org/10.4401/ag-3137 https://doi.org/10.1029/2002EO000221 https://doi.org/10.13127/ISIDE https://doi.org/10.1002/ggge.20227 https://doi.org/10.3133/ofr85739 https://doi.org/10.4401/ag-3130 https://doi.org/10.4401/ag-8575 https://doi.org/10.1029/2009GC002709 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Southern Tyrrhenian Sea Northern Sicily Focal mechanisms Focal Mechanisms in southern Tyrrhenian Sea and northern Sicily between 1 January 2000 and 31 August 2021 (STyrr_FM_2000-2021) info:eu-repo/semantics/other .eJwlzMuOgjAUANB_uWsyoTyUshuiJbISlLZ0Yyq3IGlVAhjNGP99JpnzAecNszEIqf9FkiihdBVGPo0TuloTD0bdG0gDD-xTT_0M6RuuZtGoF72fTDe8IIW7Hk7YwseDuZ3uzp2Gvw1Y7h5N8CIq510T0AfmPEJGCQpnN5IRJYu4FLGtrtxvgj5jrmJnwUoMs66WBdG30aJUs7LqiWz7_W8nikotzY2r44F0wjF-ri-ytuPUhuO-_MlC-PwCY4NCjw.aikNeg.8Q-mBaJUrtDcOhi68cu3BB3dheo